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2s + 3g = 30.700 (x2) --> 4s + 6g = 61.400 _
g = 6.500
2s + 3g = 30.700
2s + 3 (6.500) = 30.700
2s + 19.500 = 30.700
2s = 30.700 - 19.500
2s = 11.200
s = 5.600
jadi harga 1 sendok Rp. 5.600,- dan harga 1 garpu Rp. 6.500,-
semoga membantu ya :)